/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.ml.common.window;

/**
 * A windowing strategy that groups all elements into a single global window. This strategy assumes
 * that the input strategy is bounded.
 */
public class GlobalWindows implements Windows {
    private static final GlobalWindows INSTANCE = new GlobalWindows();

    private GlobalWindows() {}

    /** Gets a {@link GlobalWindows} instance. */
    public static GlobalWindows getInstance() {
        return INSTANCE;
    }

    @Override
    public int hashCode() {
        return GlobalWindows.class.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        return obj instanceof GlobalWindows;
    }
}
